Bell Work WK 5 - 1Bell Work WK 5 - 1

Bell Work WK 5 - 2Bell Work WK 5 - 2

• CC 2H2 + O2 → 2H2O 2H2 + O2 → 2H2O• 220 g 220 g 55 g (35 g Fe_20 g S_55 g FeS) 3. 55 g (35 g Fe_20 g S_55 g FeS) 3.

Do the reaction in a closed container or collect Do the reaction in a closed container or collect and measure the gas.and measure the gas.

• Exothermic physical changeExothermic physical change It is It is an endothermic change. Endothermic chemical an endothermic change. Endothermic chemical change; Heat is required to break the mercury-change; Heat is required to break the mercury-oxygen bond.oxygen bond.

• In general, an increase in temperature increases In general, an increase in temperature increases reaction rate.reaction rate. It lowers the activation energy.It lowers the activation energy.

• WaterWater The solubility of NH4Cl in The solubility of NH4Cl in water increases with an increase in temperature.water increases with an increase in temperature.